Here is a further description of the expansion to Argosy!
As your intrepid fleet explores inhabitable planets and colonizes they encounter trying obstacles. This is where heroes are born! Each challenge brings a leader into focus. That leader will then be an indispensible asset in your assent ion to rule the known universe! His or her abilities will serve to create your intergalactic empire as you send your Argosy to new worlds! The worlds that are worth 30 and 40 points will each have a random chit placed on them at the beginning of the game. When those planets are colonized a hero is born giving the player advantages in research, invasion, and colonization.